+"
×
(ÕÅ‚%U + "Õ"U)dV = (Õ"U)dS
V "V
+"
×
(ÕÅ‚%U - UÅ‚%Õ)dV = (Õ"U - U"Õ)dS
V "V
+"
×
"UdS = Å‚%UdV
"V V
Õ U
2
n
"
´n(x - x0) = e-n (x-x0)2 -" < x < " lim n = "
Ä„
Ä…
"
+" -(x-x0)2
2Ä…2
I(Ä…) = (2Ä„Ä…2)-1/2 e cos xdx
-"
n
´n(x - x0) = -" < x < "
Ä„[1+n2(x-x0)2]
1
´(ax) = ´(x)
|a|
1
´(x2 - a2) = [´(x - a) + ´(x + a)]
2|a|
¨(x)´(x - a) = ¨(a)´(x - a)
d
xdx´(x) = -´(x)
Ć
r ¸ Ć
Ć Ć